I don't care for Sybok either. If he appears in this film or not really is of no consequence. If he did appear I would assume it would be no more than a small glimpse or just a mention. Otherwise, he has no place at all.
I was just asking because I was watching TFF last night and thought it might be an interesting topic for discussion.
As for why I was watching TFF, I do that once in a while when I've already watched all the other Trek movies and still need more. Besides, I do like the interactions between Kirk, Spock, and Bones in that one.